
where \(\alpha =\omega _\text{max}^{-1}\)  and \(\beta =\eta _\text{max}^{-1}\)  with \(\omega _\text{max}\)  and \(\eta _\text{max}\)  represent the maximum efficiency of the transmit PA and the PA between the RISs, respectively. We assume that \(P_t=P_\text{max}\)  for the transmit PA. Here, \(P_\text{Tx}\)  and \(P_\text{Rx}\)  are the hardware dissipated static powers at Tx and Rx, respectively and therefore they are constant and does not depend on the system parameters. The values for the power consumption model parameters are given in Table REF  as stated in [1]}. Likewise, the power consumption of the passive RIS-assisted system can be written as follows only by omitting the power consumed by the PA between the RISs:
<TABLE>\(P_\text{tot}^\text{pas}=\alpha P_t + P_\text{Tx} + P_\text{Rx} + NP_{n}(b)\) 
